You do the same thing every day.变成否定句．

you don't do the same thing every day.

You don't do the same thing every day

You don't do the same thing every day

You don't do the same thing every day

其实，挺简单的．这句话是一般现在时．其中，只有一个动词，改为否定句时借用助动词．改为You don't do the same thing every day．
加油！！！！！！！！！！！！！！！！！！！！！！！！！！！！！

You don't do the same thing every day